i think it is good for parents to have time out and go on holiday/weekend away and be hubby and wife and not mum and dad
i do a lot of proxy parenting 24hr care for families who like to have a break whether it is a weekend away, or a week skiing/sun etc
i acn assure you that the children are happy in their own home or mine and if young as long as they get loved, fed and cared for, they wont mind who
older children think it is a treat having me to look after them and some parents ring each night to say hi, some dont, if they think they will upset their child -age depending
i always send texts daily to say all is fine/what we have done etc
my family went away this weekend for some me time and xmas shopping, my charges were THRILLED that i stayed and slept at their house, they came to see my hamsters and we played and had fun - more fun then being dragged round shops in london
but yes if parents go away alone, think they should also have a week away as a family as well